21AMD Errata: RDSEED failure on AMD Zen 5 ProcessorsSee also: https://lore.kernel.org/lkml/20251103142800.GFaQi78AgT-qjY30...I wrote a silly little testcase: https://gist.github.com/jcalvinowens/06530e6fc86f3b2c97a7027......but both affected znver5 machines I have "pass", so clearly there's more to it than AMD is telling us.You should be able to get away with "-march=znver5 -mno-rdrnd -mno-rdseed" in CFLAGS if you care.Oh, actually the original report was very specific: https://lore.kernel.org/all/20251018024010.4112396-1-gourry@...again? https://arstechnica.com/gadgets/2019/10/how-a-months-old-amd... ZEN seems to have suspiciously a lot of those rdrand "bugs"CIA and NSA really need access to your data. /s
I wrote a silly little testcase: https://gist.github.com/jcalvinowens/06530e6fc86f3b2c97a7027......but both affected znver5 machines I have "pass", so clearly there's more to it than AMD is telling us.You should be able to get away with "-march=znver5 -mno-rdrnd -mno-rdseed" in CFLAGS if you care.Oh, actually the original report was very specific: https://lore.kernel.org/all/20251018024010.4112396-1-gourry@...
Oh, actually the original report was very specific: https://lore.kernel.org/all/20251018024010.4112396-1-gourry@...
again? https://arstechnica.com/gadgets/2019/10/how-a-months-old-amd... ZEN seems to have suspiciously a lot of those rdrand "bugs"CIA and NSA really need access to your data. /s
See also: https://lore.kernel.org/lkml/20251103142800.GFaQi78AgT-qjY30...
I wrote a silly little testcase: https://gist.github.com/jcalvinowens/06530e6fc86f3b2c97a7027...
...but both affected znver5 machines I have "pass", so clearly there's more to it than AMD is telling us.
You should be able to get away with "-march=znver5 -mno-rdrnd -mno-rdseed" in CFLAGS if you care.
Oh, actually the original report was very specific: https://lore.kernel.org/all/20251018024010.4112396-1-gourry@...
again? https://arstechnica.com/gadgets/2019/10/how-a-months-old-amd... ZEN seems to have suspiciously a lot of those rdrand "bugs"
CIA and NSA really need access to your data. /s